The Structural Concrete Alliance has released several new guidance documents on the repair, maintenance and protection of concrete structures.
The Alliance, which brings together the Concrete Repair Association (CRA), Corrosion Prevention Association (CPA) and Sprayed Concrete Association (SCA), has recently added to its library of guidance documents with the publication of three new Technical Notes.
A new CRA document offers advice on Coating and protecting concrete in accordance with BS EN 1504; while the CPA has issued guidance on the use of cathodic protection systems in the form of Technical Note 22: Cathodic protection for buried & immersed structures and Technical Note 23: Cathodic protection for new structures.
Coating and protecting concrete in accordance with BS EN 1504 offers the latest advice on available materials and coating application methods.
Available for free download from the CRA website, www.cra.org.uk, the document explains that concrete can deteriorate due to mechanical, chemical and physical means, as well as a result of fire; while corrosion of reinforcement can be caused by carbonation, corrosive contaminants and stray currents. It describes in detail the use of anti-carbonation and barrier coatings, as well as hydrophobic impregnations to address these issues.
The CPA’s Technical Note 22 offers advice on Cathodic protection for buried & immersed structures. Although such structures can be protected using anode systems, the document states that protection can often be more economically provided using the cathodic methods regularly used to protect buried or immersed steel structures. The document lists the standards that apply and describes design considerations and typical applications.
Meanwhile, Technical Note 23 Cathodic protection for new structures highlights the increasing use of such systems for new structures in particularly corrosive environments, or where longevity and guaranteed durability are of particular importance.
The document offers guidance on installation and maintenance of these ‘cathodic prevention’ systems. Although noting that their use requires a commitment to monitoring, control and maintenance, the document explains that such systems have already been proven to be a cost effective method of providing corrosion control to reinforcement in many large scale applications where a long operational life is required. Both CPA documents are available for free download from the CPA website, www.corrosionprevention.org.uk
The Structural Concrete Alliance brings together the Concrete Repair Association (CRA), Corrosion Prevention Association (CPA) and Sprayed Concrete Association (SCA) to provide authoritative guidance on the repair, refurbishment and renovation of concrete; cathodic protection of steel and concrete structures; and sprayed concrete technology and application techniques.
For further information on Structural Concrete Alliance guidance documents and for details of its free regional CPD seminar programme, visit www.structuralconcretealliance.org.uk.
The Structural Concrete Alliance publishes a quarterly E-Bulletin providing the latest industry updates and news from members of the CRA, CPA and SCA, as they occur.
Formed in 1989, the CRA is committed to promoting and developing the practice of concrete repair and allied disciplines, as well as advancing education, technical training and health & safety matters in this specialist construction sector.
The Corrosion Prevention Association represents consultants, contractors and manufacturers working in the field of corrosion prevention for reinforced concrete and masonry encased steel.
Sprayed Concrete Association (SCA) represents leading contracting and manufacturing companies engaged in sprayed concrete.Tweets by @SCAlliance3